Tracking Issue (does not close):
https://github.com/zed-industries/zed/issues/35552
This is somewhat of a blocker for
https://github.com/zed-industries/zed/pull/40035 (but also the current
behavior doesn't really make sense).
The current behavior of `ThemeSelectorDelegate::set_theme` (the theme
selector menu) is to simply set the in-memory settings to `Static`,
regardless of if it is currently `Dynamic`. The reason this doesn't
matter now is that the `theme::set_theme` function that updates the
user's settings file _will_ make this check, so dynamic settings stay
dynamic in `settings.json`, but not in memory.
But this is also sort of strange, because `theme::set_theme` will set
the setting of whatever the old appearance was to the new theme name. In
other words, if I am currently on a light mode theme and I change my
theme to a dark mode theme using the theme selector, the `light` field
of `theme` in `settings.json` is set to a dark mode theme!
_I think this is because displaying the new theme in the theme selector
does not update the global context, so
`ThemeSettings::get_global(cx).theme.name(appearance).0` returns the
original theme appearance, not the new one._
---
This PR makes `ThemeSelectorDelegate::set_theme` keep the current
`ThemeSelection`, as well as changes the behavior of the
`theme::set_theme` call to always choose the correct setting to update.
One edge case that might be slightly strange now is that if the user has
specified the mode as `System`, this will now override that with the
appearance of the new theme. I think this is fine, as otherwise a user
might set a dark theme and nothing will change because the
`ThemeAppearanceMode` is set to `light` or `system` (where `system` is
also light).
I also have an `unreachable!` in there that I'm pretty sure is true but
I don't really know how to formally prove that...
Release Notes:
- N/A *or* Added/Fixed/Improved ...
---------
Signed-off-by: Connor Tsui <connor.tsui20@gmail.com>
There was a TODO in `crates/settings/src/settings_content/theme.rs` to
make this rename.
This PR is just splitting off this change from
https://github.com/zed-industries/zed/pull/40035 to make reviewing that
one a bit easier since that PR is a bit more involved than expected.
Release Notes:
- N/A
Signed-off-by: Connor Tsui <connor.tsui20@gmail.com>
A small follow-up to the settings refactor of a few weeks ago to move
all the VSCode settings imports
to one place.
This should make it easier to spot missing imports, and easier to test
the importer.
Release Notes:
- N/A
Closes https://github.com/zed-industries/zed/issues/39259
- Fixes import of `editor.fontFamily` (we were looking for the wrong
key)
- Adds basic support for the CSS font-family syntax used by VS Code,
including font fallback
Release Notes:
- N/A
Follow up to https://github.com/zed-industries/zed/pull/39468.
Unlike `agent_ui_font_size`, the `agent_buffer_font_size` setting does
have a default value, which means it does not fall back to the regular
UI font size, but rather to its default value.
Release Notes:
- N/A
Before this change the active theme and icon theme were retrofitted onto
the ThemeSettings.
Now they're in their own new global (GlobalTheme::theme(cx) and
GlobalTheme::icon_theme(cx))
This lets us remove cx from the settings traits, and tidy up a few other
things along the way.
Release Notes:
- N/A
This PR adds the numeric stepper component to the settings ui and
implements some settings that rely on this component as well.
I also switched {buffer/ui}_font_weight to the `gpui::FontWeight` type
and added a manual implementation of the Schemars trait. This allows Zed
to send min, max, and default information to the JSON LSP when a user is
manually editing the settings file.
The numeric stepper elements added to the settings ui are below:
- ui font size
- ui font weight
- Buffer font size
- Buffer font weight
- Scroll sensitivity
- Fast scroll sensitivity
- Vertical scroll margin
- Horizontal scroll margin
- Inline blame padding
- Inline blame delay
- Inline blame min column
- Unnecessary code fade
- Tab Size
- Hover popover delay
Release Notes:
- N/A
Closes https://github.com/zed-industries/zed/issues/39406
Follow up to https://github.com/zed-industries/zed/pull/38726
This PR introduces the `agent_buffer_font_size` setting and renames
`agent_font_size` to `agent_ui_font_size`. This allows whoever wants
`buffer_font_size` and `agent_buffer_font_size` to match, as well as
folks who want a slightly smaller size only in the agent panel (which...
also looks just better by default!).
Release Notes:
- agent: Introduced the `agent_buffer_font_size` setting and renamed
`agent_font_size` to `agent_ui_font_size`, allowing for granular buffer
font size control in the agent panel vs. regular editors.
https://github.com/zed-industries/zed/pull/38367 introduced panic:
```
thread 'main' panicked at crates/theme/src/settings.rs:812:18:
called `Option::unwrap()` on a `None` value
```
In this PR I restored fallback logic from the original code - before
settings refactor.
Release Notes:
- N/A
When we refactored settings to not pass JSON blobs around, we ended up
needing
to write *a lot* of code that just merged things (like json merge used
to do).
Use a derive macro to prevent typos in this logic.
Release Notes:
- N/A
Co-Authored-By: Ben K <ben@zed.dev>
Co-Authored-By: Anthony <anthony@zed.dev>
Co-Authored-By: Mikayla <mikayla@zed.dev>
Release Notes:
- settings: Major internal changes to settings. The primary user-facing
effect is that some settings which did not make sense in project
settings files are no-longer read from there. (For example the inline
blame settings)
---------
Co-authored-by: Ben Kunkle <ben@zed.dev>
Co-authored-by: Mikayla Maki <mikayla.c.maki@gmail.com>
Co-authored-by: Anthony <anthony@zed.dev>
This PR separates out the associated constant `KEY` from the `Settings`
trait into a new trait `SettingsKey`. This allows for the key trait to
be derived using attributes to specify the path so that the new
`SettingsUi` derive macro can use the same attributes to determine top
level settings paths thereby removing the need to duplicate the path in
both `Settings::KEY` and `#[settings_ui(path = "...")]`
Co-authored-by: Ben Kunkle <ben@zed.dev>
Release Notes:
- N/A
---------
Co-authored-by: Ben Kunkle <ben@zed.dev>
Closes #ISSUE
Initially, the `SettingsUi` trait was tied to `Settings`, however, given
that the `Settings::FileContent` type (which may be the same as the type
that implements `Settings`) will be the type that more directly maps to
the JSON structure (and therefore have the documentation, correct field
names (or `serde` rename attributes), etc) it makes more sense to have
the deriving of `SettingsUi` occur on the `FileContent` type rather than
the `Settings` type.
In order for this to work a relatively important change had to be made
to the derive macro, that being that it now "unwraps" options into their
inner type, so a field with type `Option<Foo>` where `Foo: SettingsUi`
will treat the field as if it were just `Foo`, expecting there to be a
default set in `default.json`. This imposes some restrictions on what
`Settings::FileContent` can be as seen in 1e19398 where `FileContent`
itself can't be optional without manually implementing `SettingsUi`, as
well as introducing some risk that if the `FileContent` type has
`serde(default)`, the default value will override the default value from
`default.json` in the UI even though it may differ (but it should!).
A future PR should probably replace the other settings with `FileContent
= Option<T>` (all of which currently have `T == bool`) with wrapper
structs and have `KEY = None` so the further niceties
`derive(SettingsUi)` will provide such as path renaming, custom UI, auto
naming and doc comment extraction can be used.
Release Notes:
- N/A *or* Added/Fixed/Improved ...
## Goal
This PR creates the initial settings ui structure with the primary goal
of making a settings UI that is
- Comprehensive: All settings are available through the UI
- Correct: Easy to understand the underlying JSON file from the UI
- Intuitive
- Easy to implement per setting so that UI is not a hindrance to future
settings changes
### Structure
The overall structure is settings layer -> data layer -> ui layer.
The settings layer is the pre-existing settings definitions, that
implement the `Settings` trait. The data layer is constructed from
settings primarily through the `SettingsUi` trait, and it's associated
derive macro. The data layer tracks the grouping of the settings, the
json path of the settings, and a data representation of how to render
the controls for the setting in the UI, that is either a marker value
for the component to use (avoiding a dependency on the `ui` crate) or a
custom render function.
Abstracting the data layer from the ui layer allows crates depending on
`settings` to implement their own UI without having to add additional UI
dependencies, thus avoiding circular dependencies. In cases where custom
UI is desired, and a creating a custom render function in the same crate
is infeasible due to circular dependencies, the current solution is to
implement a marker for the component in the `settings` crate, and then
handle the rendering of that component in `settings_ui`.
### Foundation
This PR creates a macro and a trait both called `SettingsUi`. The
`SettingsUi` trait is added as a new trait bound on the `Settings`
trait, this allows the type system to guarantee that all settings
implement UI functionality. The macro is used to derived the trait for
most types, and can be modified through attributes for unique cases as
well.
A derive-macro is used to generate the settings UI trait impl, allowing
it the UI generation to be generated from the static information in our
code base (`default.json`, Struct/Enum names, field names, `serde`
attributes, etc). This allows the UI to be auto-generated for the most
part, and ensures consistency across the UI.
#### Immediate Follow ups
- Add a new `SettingsPath` trait that will be a trait bound on
`SettingsUi` and `Settings`
- This trait will replace the `Settings::key` value to enable
`SettingsUi` to infer the json path of it's derived type
- Figure out how to render `Option<T> where T: SettingsUi` correctly
- Handle `serde` attributes in the `SettingsUi` proc macro to correctly
get json path from a type's field and identity
Release Notes:
- N/A
---------
Co-authored-by: Ben Kunkle <ben@zed.dev>
Ensures issues like #36242 and #36295 do not arise where users are
confused that the agent panel does not follow the default UI font size
whilst also keeping the possibility of customization. The agent font
size was matching the UI font size previously alredy, which makes it
easier to change it for most scenarios.
Also cleans up some related logic around modifying the font sizes.
Release Notes:
- The agent panel font size will now inherit the UI font size by default
if not set in your settings.
Closes#14050
Release Notes:
- Added the ability to set theme-specific overrides via the
`theme_overrides` setting.
---------
Co-authored-by: Peter Tripp <peter@zed.dev>
Co-authored-by: Marshall Bowers <git@maxdeviant.com>
Release Notes:
- Settings can now be configured per operating system with the new
top-level fields: `"macos"`/`"windows"`/`"linux"`. These will override
user level settings, but are lower precedence than _release channel_
settings.
Closes #ISSUE
The behavior of the theme selector is documented above the function,
copied here for reference:
```rust
/// separates theme "mode" ("dark" | "light" | "system") into two separate states
/// - appearance = "dark" | "light"
/// - "system" true/false
/// when system selected:
/// - toggling between light and dark does not change theme.mode, just which variant will be changed
/// when system not selected:
/// - toggling between light and dark does change theme.mode
/// selecting a theme preview will always change theme.["light" | "dark"] to the selected theme,
///
/// this allows for selecting a dark and light theme option regardless of whether the mode is set to system or not
/// it does not support setting theme to a static value
```
Release Notes:
- N/A *or* Added/Fixed/Improved ...
Settings Profiles
- [X] Allow profiles to be defined, where each profile can be any of
Zed's settings
- [X] Autocompletion of all settings
- [X] Errors on invalid keys
- [X] Action brings up modal that shows user-defined profiles
- [X] Alphabetize profiles
- [X] Ability to filter down via keyboard, and navigate via arrow up and
down
- [X] Auto select Disabled option by default (first in list, after
alphabetizing user-defined profiles)
- [X] Automatically select active profile on next picker summoning
- [X] Persist settings until toggled off
- [X] Show live preview as you select from the profile picker
- [X] Tweaking a setting, while in a profile, updates the profile live
- [X] Make sure actions that live update Zed, such as `cmd-0`, `cmd-+`,
and `cmd--`, work while in a profile
- [X] Add a test to track state
Release Notes:
- Added the ability to configure settings profiles, via the "profiles"
key. Example:
```json
{
"profiles": {
"Streaming": {
"agent_font_size": 20,
"buffer_font_size": 20,
"theme": "One Light",
"ui_font_size": 20
}
}
}
```
To set a profile, use `settings profile selector: toggle`
Followup to #33678, doing the same thing for all JSON Schema files
provided to json-language-server
Release Notes:
* Added warnings for unknown fields when editing `tasks.json` /
`snippets.json`.
The major change in schemars 1.0 is that now schemas are represented as
plain json values instead of specialized datatypes. This allows for more
concise construction and manipulation.
This change also improves how settings schemas are generated. Each top
level settings type was being generated as a full root schema including
the definitions it references, and then these were merged. This meant
generating all shared definitions multiple times, and might have bugs in
cases where there are two types with the same names.
Now instead the schemar generator's `definitions` are built up as they
normally are and the `Settings` trait no longer has a special
`json_schema` method. To handle types that have schema that vary at
runtime (`FontFamilyName`, `ThemeName`, etc), values of
`ParameterizedJsonSchema` are collected by `inventory`, and the schema
definitions for these types are replaced.
To help check that this doesn't break anything, I tried to minimize the
overall [schema
diff](https://gist.github.com/mgsloan/1de549def20399d6f37943a3c1583ee7)
with some patches to make the order more consistent + schemas also
sorted with `jq -S .`. A skim of the diff shows that the diffs come
from:
* `enum: ["value"]` turning into `const: "value"`
* Differences in handling of newlines for "description"
* Schemas for generic types no longer including the parameter name, now
all disambiguation is with numeric suffixes
* Enums now using `oneOf` instead of `anyOf`.
Release Notes:
- N/A
Closes#30802
Release Notes:
- Fixed issue where setting `buffer_line_height.custom` to 0 would cause
text to disappear
---------
Co-authored-by: Michael Sloan <michael@zed.dev>
You can set `agent_font_size` as a top-level settings key. You can also
use `zed::IncreaseBufferFontSize` and `zed::DecreaseBufferFontSize` and
`zed::ResetBufferFontSize` the agent panel is focused via the standard
bindings to adjust the agent font size. In the future, it might make
sense to rename these actions to be more general since "buffer" is now a
bit of a misnomer. 🍐'd with @mikayla-maki
Release Notes:
- N/A
---------
Co-authored-by: Mikayla Maki <mikayla.c.maki@gmail.com>
Things this doesn't currently handle:
- [x] ~testing~
- ~we really need an snapshot test that takes a vscode settings file
with all options that we support, and verifies the zed settings file you
get from importing it, both from an empty starting file or one with lots
of conflicts. that way we can open said vscode settings file in vscode
to ensure that those options all still exist in the future.~
- Discussed this, we don't think this will meaningfully protect us from
future failures, and we will just do this as a manual validation step
before merging this PR. Any imports that have meaningfully complex
translation steps should still be tested.
- [x] confirmation (right now it just clobbers your settings file
silently)
- it'd be really cool if we could show a diff multibuffer of your
current settings with the result of the vscode import and let you pick
"hunks" to keep, but that's probably too much effort for this feature,
especially given that we expect most of the people using it to have an
empty/barebones zed config when they run the import.
- [x] ~UI in the "welcome" page~
- we're planning on redoing our welcome/walkthrough experience anyways,
but in the meantime it'd be nice to conditionally show a button there if
we see a user level vscode config
- we'll add it to the UI when we land the new walkthrough experience,
for now it'll be accessible through the action
- [ ] project-specific settings
- handling translation of `.vscode/settings.json` or `.code-workspace`
settings to `.zed/settings.json` will come in a future PR, along with UI
to prompt the user for those actions when opening a project with local
vscode settings for the first time
- [ ] extension settings
- we probably want to do a best-effort pass of popular extensions like
vim and git lens
- it's also possible to look for installed/enabled extensions with `code
--list-extensions`, but we'd have to maintain some sort of mapping of
those to our settings and/or extensions
- [ ] LSP settings
- these are tricky without access to the json schemas for various
language server extensions. we could probably manage to do translations
for a couple popular languages and avoid solving it in the general case.
- [ ] platform specific settings (`[macos].blah`)
- this is blocked on #16392 which I'm hoping to address soon
- [ ] language specific settings (`[rust].foo`)
- totally doable, just haven't gotten to it yet
~We may want to put this behind some kind of flag and/or not land it
until some of the above issues are addressed, given that we expect
people to only run this importer once there's an incentive to get it
right the first time. Maybe we land it alongside a keymap importer so
you don't have to go through separate imports for those?~
We are gonna land this as-is, all these unchecked items at the bottom
will be addressed in followup PRs, so maybe don't run the importer for
now if you have a large and complex VsCode settings file you'd like to
import.
Release Notes:
- Added a VSCode settings importer, available via a
`zed::ImportVsCodeSettings` action
---------
Co-authored-by: Mikayla Maki <mikayla@zed.dev>
Co-authored-by: Kirill Bulatov <kirill@zed.dev>
Co-authored-by: Mikayla Maki <mikayla.c.maki@gmail.com>
Co-authored-by: Marshall Bowers <git@maxdeviant.com>
Proper version of https://github.com/zed-industries/zed/pull/25425
When https://github.com/zed-industries/zed/pull/24857 returned font
updates on settings changes, settings values, not in-memory ones should
be compared.
This PR returns back the logic finally, and changes it to explicitly
track the settings values, not the in-memory ones.
Also adds the same tracking for UI font changes, which had never been
tracked before.
Release Notes:
- Fixed font sizes not reacting on settings change
Closes https://github.com/zed-industries/zed/issues/25413
As the issue points out well, themes do not need to alter any in-memory
state on load: that is done via settings file load.
Originally, it was introduced in
https://github.com/zed-industries/zed/pull/4064 and
https://github.com/zed-industries/zed/pull/24857 had restored that
behavior, which seems wrong to do.
Apart from removing that part, removes unnecessary methods and
emphasizes that in-memory state is the Buffer/UI size — no need to add
`Adjusted` there as the settings file presence is already enough.
Release Notes:
- Fixed theme selector resetting the buffer size
This PR makes it so we don't log errors for missing themes or icon
themes until after the extensions have been loaded.
Currently, if you are using a theme that is defined in an extension it
is common to see one or more "theme not found" errors in the logs. This
is the result of us having to initialize the theme before the extensions
have actually finished loading.
This means that a theme that _may_ exist once extensions load is
considered non-existent before they have loaded.
To that end, we now wait until the extensions have loaded before we
start logging errors if we can't find the theme or icon theme.
Closes https://github.com/zed-industries/zed/issues/24539.
Release Notes:
- Reduced the number of "theme not found" and "icon theme not found"
errors in the logs for themes provided by extensions.
This PR updates the `ThemeRegistry` to return structured errors from the
`get` and `get_icon_theme` methods (which are used to retrieve themes
and icon themes, respectively).
We want to be able to carry the name of the theme that was not found as
state on the error, which is why we use a `Result` and not an `Option`.
However, we also want to be able to accurately identify when the error
case is "not found" so we can take appropriate action, based on the
circumstances.
By using a custom error type instead of an `anyhow::Error`, we get both.
There isn't any functional change in this PR. This just sets us up for
future improvements in this error.
Release Notes:
- N/A
Follow-up of https://github.com/zed-industries/zed/pull/24857
Based on the feedback,
* made non-persisting font size change as a default in Zed keymaps
JetBrains IDEs seem to persist font size changes by default, hence left
to do so in Zed keymaps too
* fixed a bug with holding a binding to change the font size caused
flickering
Release Notes:
- N/A
Closes https://github.com/zed-industries/zed/issues/23505
Now `zed::IncreaseBufferFontSize` (and all the same UI- and
Buffer-related settings) action is parameterized with `{ "persist": true
}` (default).
Using `"persist": false` brings back resizing behavior prior to
https://github.com/zed-industries/zed/pull/23265
Release Notes:
- Added a way to toggle font size without settings adjustments
This PR adds support for configuring both a light and dark icon theme in
`settings.json`.
In addition to accepting just an icon theme name, the `icon_theme` field
now also accepts an object in the following form:
```jsonc
{
"icon_theme": {
"mode": "system",
"light": "Zed (Default)",
"dark": "Zed (Default)"
}
}
```
Both `light` and `dark` are required, and indicate which icon theme
should be used when the system is in light mode and dark mode,
respectively.
The `mode` field is optional and indicates which icon theme should be
used:
- `"system"` - Use the icon theme that corresponds to the system's
appearance.
- `"light"` - Use the icon theme indicated by the `light` field.
- `"dark"` - Use the icon theme indicated by the `dark` field.
Closes https://github.com/zed-industries/zed/issues/24695.
Release Notes:
- Added support for configuring both a light and dark icon theme and
switching between them based on system preference.
Closes#24353
This PR implements icon theme reload to ensure file icons are properly
updated whenever an icon theme extension is upgraded or uninstalled.
Currently, on both upgrade and uninstall of an icon theme extension the
file icons from the previously installed version will stay visibile and
will not be updated as shown in the linked issue. With this change, file
icons will properly be updated on extension upgrade or reinstall.
The code is primarily a copy for reloading the current color theme
adapted to work for icon themes. Happy for any feedback!
Release Notes:
- Fixed file icons not being properly updated upon icon theme upgrade or
uninstall.
This PR adds support for icon themes.
Closes https://github.com/zed-industries/zed/issues/8843.
Here is Zed with Material Icons:
<img width="1136" alt="Screenshot 2025-01-30 at 7 02 06 PM"
src="https://github.com/user-attachments/assets/57d8a0e0-ff38-44d9-8628-af58a60a7c9a"
/>
### Extensions
Extensions can provide icon themes as well as the icons used in those
themes.
Icon themes are defined as JSON files in the `icon_themes` directory,
and icons included in the `icons` directory will be packaged up with the
extension.
All icon paths within an icon theme are interpreted relative to the root
of the extension.
See the [Material Icon
Theme](https://github.com/zed-extensions/material-icon-theme) extension
for an example.
Release Notes:
- Added support for icon themes.
- Extensions can now provide icon themes.
- Use the `icon theme selector: toggle` action to switch between
installed icon themes.
There's still a bit more work to do on this, but this PR is compiling
(with warnings) after eliminating the key types. When the tasks below
are complete, this will be the new narrative for GPUI:
- `Entity<T>` - This replaces `View<T>`/`Model<T>`. It represents a unit
of state, and if `T` implements `Render`, then `Entity<T>` implements
`Element`.
- `&mut App` This replaces `AppContext` and represents the app.
- `&mut Context<T>` This replaces `ModelContext` and derefs to `App`. It
is provided by the framework when updating an entity.
- `&mut Window` Broken out of `&mut WindowContext` which no longer
exists. Every method that once took `&mut WindowContext` now takes `&mut
Window, &mut App` and every method that took `&mut ViewContext<T>` now
takes `&mut Window, &mut Context<T>`
Not pictured here are the two other failed attempts. It's been quite a
month!
Tasks:
- [x] Remove `View`, `ViewContext`, `WindowContext` and thread through
`Window`
- [x] [@cole-miller @mikayla-maki] Redraw window when entities change
- [x] [@cole-miller @mikayla-maki] Get examples and Zed running
- [x] [@cole-miller @mikayla-maki] Fix Zed rendering
- [x] [@mikayla-maki] Fix todo! macros and comments
- [x] Fix a bug where the editor would not be redrawn because of view
caching
- [x] remove publicness window.notify() and replace with
`AppContext::notify`
- [x] remove `observe_new_window_models`, replace with
`observe_new_models` with an optional window
- [x] Fix a bug where the project panel would not be redrawn because of
the wrong refresh() call being used
- [x] Fix the tests
- [x] Fix warnings by eliminating `Window` params or using `_`
- [x] Fix conflicts
- [x] Simplify generic code where possible
- [x] Rename types
- [ ] Update docs
### issues post merge
- [x] Issues switching between normal and insert mode
- [x] Assistant re-rendering failure
- [x] Vim test failures
- [x] Mac build issue
Release Notes:
- N/A
---------
Co-authored-by: Antonio Scandurra <me@as-cii.com>
Co-authored-by: Cole Miller <cole@zed.dev>
Co-authored-by: Mikayla <mikayla@zed.dev>
Co-authored-by: Joseph <joseph@zed.dev>
Co-authored-by: max <max@zed.dev>
Co-authored-by: Michael Sloan <michael@zed.dev>
Co-authored-by: Mikayla Maki <mikaylamaki@Mikaylas-MacBook-Pro.local>
Co-authored-by: Mikayla <mikayla.c.maki@gmail.com>
Co-authored-by: joão <joao@zed.dev>
This PR adds the supporting infrastructure to support loading icon
themes defined by extensions.
Here's an example icon theme:
```json
{
"name": "My Icon Theme",
"author": "Me <me@example.com>",
"themes": [
{
"name": "My Icon Theme",
"appearance": "dark",
"file_icons": {
"gleam": { "path": "./icons/file_type_gleam.svg" },
"toml": { "path": "./icons/file_type_toml.svg" }
}
}
]
}
```
The icon paths are resolved relative to the root of the extension
directory.
Release Notes:
- N/A
This PR adds the initial concept of an `IconTheme` and refactors
`FileIcons` to use it to resolve the icons.
The `IconTheme` will ultimately be used to allow users to select a
different set of icons to use. Currently, however, this is just laying
the foundation for that work.
The association between file types and icons is now handled by the icon
theme when we resolve file icons. This mapping has been moved out of
`file_types.json` and into `icon_theme.rs`.
Release Notes:
- N/A
This PR reverts #20076 to turn the `ThemeRegistry` back into a regular
struct again.
It doesn't actually help us by having it behind a trait.
Release Notes:
- N/A
